K&N Performance Panel Air Filter/Panel Insert for BMW 3 Series E46 Compact 318d 318td (2001-2005) - Washable Reusable Oiled Cotton - Drop-In OEM Airbox Replacement Intake/Induction Filter - Diesel Air Cleaner Upgrade

K&N Cotton Gauze Panel Element for BMW E46 3 Series 318d 318td Compact 2001 to 2005

Give your diesel E46 Compact the clean breathing it deserves with a premium K&N serviceable panel element. This OEM-style insert slides straight into the stock airbox, delivering a freer intake path for crisper pedal response, smoother pull through the revs and excellent engine protection. No cutting, no coding, no fuss. Just a simple swap for a proven upgrade.

Built with K&N’s renowned multi-layer oiled cotton media, this lifetime air element is washable and reusable, helping reduce waste and long-term running costs compared with disposable paper filters. It is engineered for strong filtration efficiency without choking airflow and is supported by the famous K&N Million Mile Limited Warranty. We fit these on our own cars and our customers love the difference in driveability and the subtle induction note under load.

Key benefits

• Free-flowing intake for sharper throttle feel and more eager acceleration
• High-quality, reusable cotton gauze media for long service life
• Direct-fit panel insert for the factory E46 Compact airbox
• Simple DIY install with basic tools in minutes
• Optimised filtration to help guard your engine on daily commutes and motorway runs
• Cleans and re-oils with a K&N care kit for repeated use
• Compatible with factory sensors and electronics
• Backed by the K&N Million Mile Limited Warranty

Vehicle compatibility

BMW 3 Series E46 Compact 318d and 318td, model years 2001, 2002, 2003, 2004, 2005. Direct replacement for the standard panel element in the original airbox. If you would like us to confirm fitment for your registration or VIN, get in touch and we will be happy to help.

Fitting and upkeep

Installation is plug-and-play. Open the airbox, remove the old paper element and slot in the K&N panel insert. No remap required. When service is due, wash and re-oil using a K&N cleaning kit, then refit and drive.

Professional installation

Prefer a specialist to handle it? MJ Modifications offers fitting in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Why buy from MJ Modifications

We are performance parts enthusiasts who only supply products we trust. We have installed these filters for many happy BMW owners and run them ourselves. Expect knowledgeable advice, friendly service and fast dispatch.

Also searched as

BMW E46 diesel air filter upgrade, BMW 318d Compact panel insert, BMW 318td reusable air cleaner, K&N cotton filter BMW 3 Series Compact, E46 3 Series diesel intake filter, lifetime washable panel element BMW, OEM airbox replacement filter BMW 318d 318td, performance air cleaner insert E46 Compact 2001 to 2005, BMW diesel filter element upgrade, free-flow panel filter for BMW 3 Series E46 Compact.

Order today for a simple, cost-effective intake upgrade that keeps your E46 318d or 318td breathing freely mile after mile.